Method for non-interference superposition of multiple paths of scaled laser pulse ranging echo signals

Abstract

The invention relates to a method for non-interference superposition of multi-path scaled laser pulse ranging echo signals, which comprises the following steps: original laser pulse ranging echo signals are inputted into multi-path grading scaling circuits, and the corresponding scaling multiple is set for each scaling circuit; each path of laser pulse ranging echo zoom signals is subjected to fixed delay at different times through a delay circuit, all the laser pulse ranging echo zoom signals staggered in time are superposed into one path through a signal superposition circuit, and the superposed signals are output backwards to an AD circuit; and after the AD circuit samples the superposed signals, traversing is carried out from the strong signal side to the weak signal side, an optimal signal is selected, and the wave order number of the current optimal signal is calculated, so that the delay time of the current signal is obtained. According to the invention, multiple paths of scaled signals can be staggered in time through a time delay technology, and the signals staggered in time are superposed into one path, so that the processing requirement can be met only by one path of AD.

Description

technical field [0001] The present invention relates to the field of electronic information technology, and more specifically relates to a method for non-interference superposition of multi-channel zoomed laser pulse ranging echo signals. Background technique [0002] The pulse laser radar measures the distance of the target object by transmitting laser pulses to the target object and detecting the return laser pulse echo signal of the target object by calculating the flight time of the pulse. High-precision pulse lidar usually also detects the waveform information of the echo pulse, and further improves the ranging accuracy through waveform analysis. Good waveform acquisition capability is the core capability of high-precision lidar. [0003] The wide dynamic range adaptation of target reflected laser pulse signal amplification detection is one of the main problems in LiDAR system. The range of short-range lidar is mostly within a hundred meters; the range of medium and l...

AI Technical Summary

Problems solved by technology

High-speed AD devices are more expensive, and each additional AD will increase the circuit and device costs of the equipment

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